The F♯ Note
F♯ is a black key, immediately next to F. It sounds at 369.99 Hz in octave 4.
F♯ on the piano
Key facts
- On the keyboard
- a black key, immediately next to F.
- Frequency (octave 4)
- 369.99 Hz
- MIDI number (octave 4)
- 66
- Also written as
- G♭
- In key signatures
- The 1 sharp in the order of sharps.
F♯ and its enharmonic spellings
F♯ can also be written as G♭. These are enharmonic equivalents: the same pitch, the same key on the piano, a different name on the page. Which spelling is correct depends on the key and on how the note functions, not on the sound.
F♯ frequency in every octave
Frequencies for F♯ in scientific pitch notation, with A4 tuned to 440 Hz.
| Note | MIDI | Frequency |
|---|---|---|
| F♯1 | 30 | 46.25 Hz |
| F♯2 | 42 | 92.5 Hz |
| F♯3 | 54 | 185 Hz |
| F♯4 | 66 | 369.99 Hz |
| F♯5 | 78 | 739.99 Hz |
| F♯6 | 90 | 1479.98 Hz |
| F♯7 | 102 | 2959.96 Hz |
Chords on F♯
The most common chords built with F♯ as the root.
Scales starting on F♯
Keys and scales that use F♯ as their tonic.
All notes
الأسئلة الشائعة
Where is F♯ on the piano?
F♯ is a black key, immediately next to F.
What frequency is F♯4?
F♯4 sounds at 369.99 Hz with A4 tuned to 440 Hz.
What is another name for F♯?
F♯ can also be written as G♭. They are the same pitch spelled differently.
